Furnace



N. M. HARTZELL.

FURNACE.

APPLICATION man '1AN.22. 1921.

1,414,276. PatenaAprjz5,1922.

UNITED,

rms-fe;

:i Be it 'known'y thatfIiyNoLu MARKl HARr'r' ZELL, a citizen ofthe AUnited States, residing at Philadelphia, intheYA county of Fhi'ladeleV phia and, State' off' Pennsylvania, haverin-`` J2" vented :certain new and v y'useful i Improve?. ments in Furnaces, of; which 1 the following-f -is-a specification. f y f- This invention relates tof.improvements:inY furnacesof thepclassof pipeless furnaces,

and `has' `for one of its .objects to' provide a simply constructed device whereby the opern ation is improved and the 'efliciency increased without material .addition to the expense of construction'.-

With this and other objects in view, the

invention consists incertain novel. features Y of construction as hereafter shown and described, and then speciically pointed out in the` claims, and in the drawing illustrative of the preferred embodiment of the inven- Y tion. e

Figure 1 is afvertical sectional elevation:l Figure 2 is an enlarged transverse section on the linef2-2 of Figure The improved device is applied to any of the classes of hot air fur- V naces constructed of an outer casing or shell,

a combustion chamber within the shell, and an inner or intermediate casing formed of Y spaced walls and constituting an insulating air chamber between the outer casing and" the combustion chamber, or between the upwardlyflowing warm. lair currentsand the downwardly'flowing cold or-'return air currents. Y Y

The present invention comprises Ya plurality of vertically arranged combined division and stay or supportingmembers eX- tending betwen the walls of theinner casing and producing a corresponding plurality of vertically directed smaller chambers which not only support thel walls of the inner cas ing and prevent them from collapsing, .but likewise divide the insulating chamber into a plurality of Yindependent portions or units,

. and confining the airtherein in thesmaller.

throughout.

chambers, and thus equalizing the temperature and preventing the passage of the confinedA air from one side to the other ofthe casing.

An insulating blanket"7 or b aftle."is thus provided between the warm air and coldwair currents, and of uniformv temperature Theinvention therefore comprises a vplu-k ladapted to be relitti T6291/ s'haiofd?'divisioiimettersi-,ati

Cached'alternatelytothe wallsjof 'the inner casing so `that.therequisite' longitudinal a'ir i pockets are formed betweenthewal'ls ofthe inner casingwithoutn attaching v'the casing Vmemberstoeachother; .f1

ln ,the'draw'ing illustrative of the''em 1;' bodirnentof lthe f'invention', `the outer" casing v or shell `is represented at', 10, fthelhre pot'at- 11,. thelash pit atM-Lfandthe combustion The inner casing comprises` an outer .wall 17' and inner wall 18, and is located between the register 15, whilethe inner wall 17 is chamberat l-.f-fThe louter casing is'f 'coni-j Y 'Ti verged at 14 and communicates witha regisl 'ter' devicel inthe floor 16. 7o

the outer casi-ngl'() and the re potll land i, i

the combustion chamber 13', as shown. The Y vouterwall 17 of the inner vcasing extends to lspaced from the registeriat theupperedge v as s how'n. The air heated by the radiation from lthe combustion chamber f passes up-V the'jinnercasing', and thence through the -in Figure 1.

st j

Located between the walls 17e-181' of .the 'l inner Acasing are aplurality of'vertically directed combineddividing and stay members ,Y i 90 l 19, in 'spaced' relation, as shown morefclearly 1n Figures 2 and. f

The Vdivision members 19'v arer preferably formed4 in V-Shape transversely, as shown in Fig. 2fwith each alternate' division member attached by its base to ltheoi'iterwall 17 of the inner casing and inV Contact its apex with the inner 'wall-18 but not'attachedto the linner y walland'jthe other alternating` A l' 'division members each attached by its base to the inner -wall 158 and in contactby its thereto.

" The members x19" thus divide the spacebei tween thewalls 17 andf18 into ay plurality i ofrelatively small vertical chambers, or air pockets whichl efectually prevent the confined air `from Vpassing laterally'between the i l walls ofthe inner-casing. By'this arrange Y -jl y Y mentthe spaced,;\valls 17 andf18V are frein- 1'10" not positively'connected,sothat theyjwill Y. l not warp ortwistunder theinluence of. the Y i forced and supported while at the same time 10o` `rv apex with theinne'rfwall but not attached heat.` VThe temperature of the pockets of..

the inner casingi's thus equalizeduso that the Vinsulation is uniformk over all'portio'ns of the inner case.

The members 19 likewise form eil'ectual"l stays or supports to prevent the collapse or expansionr of the Walls 17 and 18 of the inner casing. Y

The preferred embodiment of the invention is disclosed in thedrawing an'dset forth in the specication, but it-Will bev understood that'any modification Withinlthescope ofthe claimed invention may be made in lthee con-' struction Without departingfrom the principle of the inventionor sac'rifi'cingany' of its advantages. v

* and in free plurality of bracing members in spaced rey lation between Vsaid Walls, eachV alternate Y "bracing member being attachedto the inner Walland in free contact with the outer Wall, i

and the other alternate bracing members attached tothe outer Walland in free contact With the inner Wall.v

2. In a furnaceyan inner Wall member and an outer Wall member in spaced relation;y a

plurality of V-shaped bracing members in spacedy relationbetween said Walls,fl each each other alternategbracing. memberl at-1 inner Wall,

alternate bracing member'beingattached by,

its spaced ends to ythe'iinner walliandfinz'freer contactat its-apexv with the outer Wall, andi c NOBLE MARIQH-ARTZELL.,

35 tach'ed by its spaced ends tothe: outerv Walla` c.

contact by ,itspapexfwith the 

